3881. Direction Assignments with Exactly K Visible People

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You are given three integers n, pos, and k. There are n people standing in a line indexed from 0 to n - 1. Each person independently chooses a direction: - 'L': visible only to people on their right - 'R': visible only to people on their left A person at index pos sees others as follows: - A person i < pos is visible if and only if they choose 'L'. - A person i > pos is visible if and only i

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